I’m wanting to put a turbo 350 transmission in the truck it has a 4L60 In it what would I have to change to make it fit?

 

A fat wallet would be good. We don't do much of the modification stuff here, unless it's carb to TBI or visa-versa.Whatever gets it running, but in your case its already running and when I was racing dirt-bikes, we has a saying" "run what you brung", when people regretted buying the current bike they were riding, during (gas-stop) of after a race.

 

Should bolt in, going to need a driveshaft rework and you'll have to figure out the downshift cable arrangement. Can't say I can see a good reason for doing this though.